| Year | Answer | % Correct |
|---|---|---|
| 2008,2011 | Rome | 96%
|
| 2008,2011 | Melbourne | 94%
|
| 2009 | Paris | 94%
|
| 2011 | Madrid | 92%
|
| 2011 | New York | 90%
|
| 2007,2011 | Miami | 88%
|
| 2008 | Shanghai | 85%
|
| 2010 (doubles),2011 | London | 83%
|
| 2008,2011 | Indian Wells | 77%
|
| 2009,2010 | Beijing | 73%
|
| 2009,2010,2011 | Dubai | 71%
|
| 2007,2011 | Montreal | 69%
|
| 2009,2011 | Belgrade | 67%
|
| 2009 | Basel | 46%
|
| 2007 | Vienna | 35%
|
| 2006 | Amersfoort | 25%
|
| 2006 | Metz | 25%
|
| 2007 | Adelaide | 23%
|
| 2007 | Estoril | 23%
|